package com.ssm.util;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

public final class TransUtil {

	 /**
    * @Title: transBean2Map
    * @Description: javaBean转换成Map
    * @param obj 需要转换成map的bean对象
    * @return
    * @author 
    * @date 
    */
   public static Map<String, Object> transBean2Map(Object obj) {

       if (obj == null) {
           return null;
       }
       Map<String, Object> map = new HashMap<String, Object>();
       try {
           BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
           PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
           for (PropertyDescriptor property : propertyDescriptors) {
               String key = property.getName();

               // 过滤class属性
               if (!key.equals("class")) {
                   // 得到property对应的getter方法
                   Method getter = property.getReadMethod();
                   Object value = getter.invoke(obj);

                   map.put(key, value);
               }
           }
       } catch (Exception e) {
       }
       return map;
   }

   /**
    * @Title: transMap2Bean
    * @Description: 将Map转换成javaBean
    * @param map 需要转换成javaBean的map
    * @param obj 换成的javaBean
    * @author 
    * @date 
    */
   public static void transMap2Bean(Map<String, Object> map, Object obj) {

       try {
           BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
           PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();

           for (PropertyDescriptor property : propertyDescriptors) {
               String key = property.getName();

               if (map.containsKey(key)) {
                   Object value = map.get(key);
                   // 得到property对应的setter方法
                   Method setter = property.getWriteMethod();
                   setter.invoke(obj, value);
               }
           }

       } catch (Exception e) {
       }
       return;
   }
}
